Documentation
Zenith Public API
The Zenith API gives you read-only access to your company's financial data — bank transactions, expenses, partners, bank accounts, and yearly report aggregates — over plain HTTPS + JSON.
Code
A 60-second tour
Code
What you can read
| Resource | Endpoint | Notes |
|---|---|---|
| Bank transactions | /transactions, /transactions/{id} | Clean bank-connector records; split transactions carry their pieces in children |
| Expenses | /expenses, /expenses/{id} | Supplier invoices with line items and payments |
| Partners | /partners | Suppliers/buyers, searchable |
| Bank accounts | /bank-accounts | Source of the bank_account_id filter |
| Account balances | /bank-accounts/{id}/balances | Stored balance series per account, newest first; first row is the current balance |
| Yearly summary | /reports/yearly-summary | Monthly totals by category — use this instead of paginating raw documents |
| Credentials | /me | The token + company bound to your credentials |
The API is V1 and read-only. Breaking changes will ship as /v2 with a
documented sunset period — additive changes (new fields) can happen at any
time, so tolerate unknown fields.
The full machine-readable contract lives at
hub.zenith-books.com/api/public/v1/openapi.yaml
— the same document that renders the API Reference section of this
site.
Next: create an API token, or plug your books straight into Claude via MCP.
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